Article (Scientific journals)
Brazilian montane rainforest expansion induced by Heinrich Stadial 1 event
Pinaya, Jorge L. D.; Cruz, Francisco W.; Ceccantini, Gregório C. T. et al.
2019In Scientific Reports, 9 (1), p. 17912
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Abstract :
[en] The origin of modern disjunct plant distributions in the Brazilian Highlands with strong floristic affinities to distant montane rainforests of isolated mountaintops in the northeast and northern Amazonia and the Guyana Shield remains unknown. We tested the hypothesis that these unexplained biogeographical patterns reflect former ecosystem rearrangements sustained by widespread plant migrations possibly due to climatic patterns that are very dissimilar from present-day conditions. To address this issue, we mapped the presence of the montane arboreal taxa Araucaria, Podocarpus, Drimys, Hedyosmum, Ilex, Myrsine, Symplocos, and Weinmannia, and cool-adapted plants in the families Myrtaceae, Ericaceae, and Arecaceae (palms) in 29 palynological records during Heinrich Stadial 1 Event, encompassing a latitudinal range of 30°S to 0°S. In addition, Principal Component Analysis and Species Distribution Modelling were used to represent past and modern habitat suitability for Podocarpus and Araucaria. The data reveals two long-distance patterns of plant migration connecting south/southeast to northeastern Brazil and Amazonia with a third short route extending from one of them. Their paleofloristic compositions suggest a climatic scenario of abundant rainfall and relative lower continental surface temperatures, possibly intensified by the effects of polar air incursions forming cold fronts into the Brazilian Highlands. Although these taxa are sensitive to changes in temperature, the combined pollen and speleothems proxy data indicate that this montane rainforest expansion during Heinrich Stadial 1 Event was triggered mainly by a less seasonal rainfall regime from the subtropics to the equatorial region.
Disciplines :
Life sciences: Multidisciplinary, general & others
Author, co-author :
Pinaya, Jorge L. D.
Cruz, Francisco W.
Ceccantini, Gregório C. T.
Corrêa, Pedro L. P.
Pitman, Nigel
Vemado, Felipe
Lopez, Maria Del Carmen S.
Pereira Filho, Augusto J.
Grohmann, Carlos H.
Chiessi, Cristiano M.
Stríkis, Nicolás M.
Horák-Terra, Ingrid
Pinaya, Walter H. L.
de Medeiros, Vanda B.
Santos, Rudney De A.
Akabane, Thomas K.
Silva, Maicon A.
Cheddadi, Rachid
Bush, Mark
Henrot, Alexandra-Jane ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques
François, Louis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques
Hambuckers, Alain  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Boyer, Frédéric
Carré, Matthieu
Coissac, Eric
Ficetola, Francesco
Huang, Kangyou
Lézine, Anne-Marie
Nourelbait, Majda
Rhoujjati, Ali
Taberlet, Pierre
Sarmiento, Fausto
Abel-Schaad, Daniel
Alba-Sánchez, Francisca
Zheng, Zhuo
De Oliveira, Paulo E.
More authors (26 more) Less
Language :
English
Title :
Brazilian montane rainforest expansion induced by Heinrich Stadial 1 event
Publication date :
2019
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
9
Issue :
1
Pages :
17912
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
VULPES Project
Funders :
Belmont Forum [UY]
Commentary :
Journal Article
Available on ORBi :
since 29 November 2019

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